Moderate: libexif security update

Updated libexif packages that fix several security issues are now available
for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

The libexif packages contain the Exif library. Exif is an image file format
specification that enables metadata tags to be added to existing JPEG, TIFF
and RIFF files. The Exif library makes it possible to parse an Exif file
and read this metadata.

An infinite recursion flaw was found in the way libexif parses Exif image
tags. If a victim opens a carefully crafted Exif image file, it could cause
the application linked against libexif to crash. (CVE-2007-6351)

An integer overflow flaw was found in the way libexif parses Exif image
tags. If a victim opens a carefully crafted Exif image file, it could cause
the application linked against libexif to execute arbitrary code, or crash.
(CVE-2007-6352)

Users of libexif are advised to upgrade to these updated packages, which
contain backported patches to resolve these issues.

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

425551 - CVE-2007-6351 libexif infinite recursion flaw (DoS)
425561 - CVE-2007-6352 libexif integer overflow

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6351
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6352
http://www.redhat.com/security/updates/classification/#moderate